<template>
  <div>
    <h1>{{id? '编辑':'新增'}}广告位</h1>
    <el-form
      label-width="120px"
      @submit.native.prevent="save"
      :rules="rules"
      ref="modelRef"
      :model="model"
    >
      <el-form-item label="名称" prop="name">
        <el-input v-model="model.name"></el-input>
      </el-form-item>
      <el-form-item label="广告">
        <el-button size="small" @click="model.items.push({})">
          <i class="el-icon-plus"></i> 添加广告
        </el-button>
        <el-row type="flex" style="flex-wrap:wrap">
          <el-col :md="24" v-for="(item,i) in model.items" :key="i">
            <el-form-item label="跳转链接(URL)" prop="name">
              <el-input v-model="item.url"></el-input>
            </el-form-item>
            <el-form-item label="图片" style="margin-top:2rem;">
              <el-upload
                class="avatar-uploader"
                prop="name"
                :action="uploadUrl"
                :headers="getAuthHeaders()"
                :show-file-list="false"
                :on-success="res => $set(item,'image',res.url)"
              >
                <img v-if="item.image" :src="item.image" class="avatar" />
                <i v-else class="el-icon-plus avatar-uploader-icon"></i>
              </el-upload>
            </el-form-item>
            <el-form-item>
              <el-button type="danger" size="small" @click="model.items.splice(i,1)">删除</el-button>
            </el-form-item>
          </el-col>
        </el-row>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" native-type="submit">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
export default {
  props: {
    id: {}
  },
  data() {
    return {
      model: {
        name: "",
        items: []
      },
      rules: {
        name: [{ required: true, message: "请输入活动名称", trigger: "blur" }]
      }
    };
  },
  methods: {
    // 保存
    save() {
      this.$refs.modelRef.validate(async valid => {
        if (!valid) {
          return this.$message({ type: "error", message: "必填项不能为空" });
        }
        let res;
        if (this.id) {
          res = await this.$http.put(`/rest/ads/${this.id}`, this.model);
        } else {
          res = await this.$http.post("/rest/ads", this.model);
        }
        this.$router.push("/ads/list"); // 创建完成之后跳转到列表
        this.$message({
          type: "success",
          message: "保存成功"
        });
      });
    },
    async fetch() {
      const res = await this.$http.get(`/rest/ads/${this.id}`); // 根据ID获取名称
      this.model = Object.assign({}, this.model, res.data);
    }
  },
  created() {
    this.id && this.fetch();
  }
};
</script>

<style>
</style>